London rocket
sisymbrium irio
Also known as: ["London rocket","wild mustard"]
Overview
An annual herbaceous plant in the Brassicaceae family, known for its pinnate leaves and small yellow flowers.
Benefits & Perks
["drought tolerant","wildlife attractant (bees, butterflies, birds)"]
Botanical Classification
| Phylum: | Magnoliophyta |
| Class: | Magnoliopsida |
| Order: | Brassicales |
| Family: | Brassicaceae |
| Genus: | Sisymbrium |
| Botanical Name: | Sisymbrium irio |
Plant Characteristics
Basic Information
- Category: Herbs & Weeds
- Suitable Location: garden bed or container in a sunny spot
- Suitable For:
- Is Weed: No
- Allergenicity: low
Environmental Needs
- Climate: {"temperatureRange":"5–35°C"}
- Hardiness: {"zones":"8–11"}
- Misting: rarely required
- Drainage: Fast-draining to prevent waterlogging.
- Soil Type: Well-draining, loamy soil with added organic matter.
Maintenance Level
- Maintenance Level: very low
- Toughness Level: very high
- Pruning Frequency: As needed, typically every 2–3 months or after flowering.
- Pruning Intensity: Light to moderate; avoid heavy pruning unless necessary.
Care Details
Ideal Sunlight Coverage:
Full sun (6–8 hours/day); tolerates partial shade in hot climates.
Sunlight Tolerance Tips:
Acclimate gradually to intense sunlight; protect from harsh afternoon sun; adjust placement based on seasonal light changes.
Care Requirements
Care Difficulty
very easyeasy
Sunlight
full sun to partial shade
Rotate plant for even light exposure; use sheer curtains to filter intense sun; avoid drafty windows.
Watering
every 7–10 days during active growth, reduce in winter
Water thoroughly but infrequently; ensure soil dries between waterings; avoid overhead watering.
Soil
well-draining, sandy loam
pH: Slightly acidic to neutral (pH 6.0–7.0).
Use a mix of potting soil and perlite; avoid heavy clay soils; check drainage before planting.
Temperature
Prefers moderate temperatures (60–75°F); tolerates mild frosts but avoids extreme heat.
Avoid sudden temperature shifts; protect from drafts; monitor for signs of stress.
Fertilizing
every 4–6 weeks during growing season
Apply fertilizer after watering; flush soil occasionally to prevent salt buildup; stop fertilizing before flowering.
Propagation
Methods
Stem cuttings or seed; stem cuttings root easily in warm conditions.
Step-by-Step Propagation Guide
- Take a 4–6 inch cutting.
- Remove lower leaves.
- Dip in hormone (optional).
- Plant in medium.
- Keep moist.
Best Time: Spring or early summer when the plant is actively growing.
Environment
Warm (70–75°F), humid, and bright indirect light.
Medium
Well-draining potting mix with perlite or sand; can also root in water.
Hormone
Optional but recommended for faster rooting.
Timeline
Roots develop in 2–4 weeks; new growth appears in 6–8 weeks.
Tools Needed
Pruners, rooting hormone, small pots, well-draining mix.
Quick Tips
Use sterile tools; maintain high humidity; avoid direct sun during rooting.
Pruning & Repotting
Pruning Guide
Method
Pinch back tips or cut stems just above a leaf node; remove spent flowers to promote reblooming.
Pruning Plan
Light pruning to maintain shape and encourage bushier growth; remove dead or leggy stems.
Tools
Pruning shears, sharp scissors, or your fingers for pinching.
Checklist
Sterilize tools; prune dead or damaged growth; shape as desired; clean up debris.
Repotting Guide
Best Season
Spring, before the active growing season begins.
Pot Size
One size up (e.g., from 4-inch to 6-inch pot); ensure good drainage.
Method
Remove plant gently; trim roots if crowded; place in a slightly larger pot with fresh soil; water lightly.
Suggestions
Repot every 1–2 years or when roots fill the pot; beneficial for growth and soil freshness.
Checklist
Choose appropriate pot; prepare new soil; handle roots carefully; water after repotting.
Advanced Care Tips
Watering Mastery
Watering Checklist
Check soil moisture; water deeply; ensure drainage; avoid wetting leaves.
How to Apply Water Properly
Water at the base of the plant, ensuring moisture reaches the root zone; allow excess water to drain away; water in the morning to reduce evaporation.
Watering Schedule Tips
Water deeply once the top inch of soil feels dry; reduce frequency in winter to prevent root rot.
Soil Improvement
Add perlite or sand for drainage; incorporate compost for fertility; ensure good aeration.
Temperature Stress Management
Signs of Temperature Issues
Wilting, yellowing leaves, or stunted growth in extreme heat; leaf drop or browning in cold stress.
Cold Stress
Slows growth; may cause leaf discoloration or dieback in prolonged cold.
Solution: Move to a warmer location; provide frost protection; reduce watering in cold periods.
Hot Stress
Leaves may scorch, wilt, or drop; flowering may be reduced.
Solution: Provide shade during peak heat; increase humidity; water more frequently but avoid waterlogging.
Fertilizing Guide
Fertilizing Checklist
Check fertilizer type; dilute properly; apply during active growth; avoid winter feeding.
Fertilizing Method
Use balanced liquid fertilizer diluted to half strength every 4–6 weeks during growing season; avoid fertilizing in winter.
Common Problems & Solutions
Toxicity Warning
Cats
Slightly ToxicCats may experience mild gastrointestinal irritation if they consume Sisymbrium irio. The glucosinolates in the plant can cause digestive upset, though serious toxicity is rare.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Dogs
Slightly ToxicIn dogs, ingestion of Sisymbrium irio can lead to mild gastrointestinal upset due to the presence of glucosinolates. The effects are typically not severe but can cause discomfort.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Humans
Slightly ToxicSisymbrium irio, commonly known as London rocket, contains glucosinolates which can cause mild gastrointestinal distress upon ingestion. The physiological impact is generally limited to irritation of the digestive tract.
⚠️ Symptoms:
🌿 Toxic Parts:
⚡ Toxic If:
if eaten
Frequently Asked Questions
Q: Is Sisymbrium irio edible?
A: Traditional uses suggest it may be edible, but caution is advised due to potential toxicity.
Q: Does London rocket attract wildlife?
A: Yes, it attracts bees, butterflies, and birds.
Q: How does Sisymbrium irio grow?
A: It is an annual plant that thrives in disturbed soils and can spread rapidly.
Quick Reference
| Family: | Brassicaceae |
| Care: | very easy |
| Light: | full sun to partial shade |
| Water: | every 7–10 days during activ |
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